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771.0 Aluminum vs. 8021 Aluminum

Both 771.0 aluminum and 8021 aluminum are aluminum alloys. They have a moderately high 92% of their average alloy composition in common. There are 29 material properties with values for both materials. Properties with values for just one material (2, in this case) are not shown.

For each property being compared, the top bar is 771.0 aluminum and the bottom bar is 8021 aluminum.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 70
70
Elongation at Break, % 1.7 to 6.5
2.3
Fatigue Strength, MPa 92 to 180
61
Poisson's Ratio 0.32
0.33
Shear Modulus, GPa 26
26
Tensile Strength: Ultimate (UTS), MPa 250 to 370
160
Tensile Strength: Yield (Proof), MPa 210 to 350
130

Thermal Properties

Latent Heat of Fusion, J/g 380
400
Maximum Temperature: Mechanical, °C 180
170
Melting Completion (Liquidus), °C 630
650
Melting Onset (Solidus), °C 620
640
Specific Heat Capacity, J/kg-K 870
900
Thermal Conductivity, W/m-K 140 to 150
220
Thermal Expansion, µm/m-K 24
23

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 27
56
Electrical Conductivity: Equal Weight (Specific), % IACS 82
180

Otherwise Unclassified Properties

Base Metal Price, % relative 9.5
9.0
Density, g/cm3 3.0
2.8
Embodied Carbon, kg CO2/kg material 8.0
8.1
Embodied Energy, MJ/kg 150
150
Embodied Water, L/kg 1130
1180

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 4.4 to 20
3.4
Resilience: Unit (Modulus of Resilience), kJ/m3 310 to 900
130
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 46
49
Strength to Weight: Axial, points 23 to 35
16
Strength to Weight: Bending, points 29 to 39
23
Thermal Diffusivity, mm2/s 54 to 58
88
Thermal Shock Resistance, points 11 to 16
7.0

Alloy Composition

Aluminum (Al), % 90.5 to 92.5
98 to 98.8
Chromium (Cr), % 0.060 to 0.2
0
Copper (Cu), % 0 to 0.1
0 to 0.050
Iron (Fe), % 0 to 0.15
1.2 to 1.7
Magnesium (Mg), % 0.8 to 1.0
0
Manganese (Mn), % 0 to 0.1
0
Silicon (Si), % 0 to 0.15
0 to 0.15
Titanium (Ti), % 0.1 to 0.2
0
Zinc (Zn), % 6.5 to 7.5
0
Residuals, % 0
0 to 0.15